https://devzone.nordicsemi.com/f/nordic-q-a/73017/nrf52840-802-15-4-intercept-beginning-of-radio-packetHi ! I&#39;m trying to access the beginning of a packet that is being transmitted, by accessing the SFD. My problem is that I&#39;m not able to do it. NRF got a function called nrf_radio_sfd_get(), it does however not work and does only return 167. Anyoneen-USTelligent Community 13Tue, 23 Mar 2021 13:01:29 GMThttps://devzone.nordicsemi.com/thread/301431?ContentTypeID=1Tue, 23 Mar 2021 13:01:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7fc837c7-b6ea-4e7e-8fb9-7195af0d52feVidar Berg<p>Hello Aron,</p> <p>Sorry, but I&#39;m not sure I understand the question. Could you possibly elaborate a bit more on what you are trying to achieve with this? To be intercept a RADIO transmission I believe you would have to configure a SW interrupt to trigger on the RADIO FRAMESTART event (via PPI).</p> <p>Kind regards,</p> <p>Vidar</p><div style="clear:both;"></div>